Where to find Swellow in Sun, Moon, Ultra Sun & Ultra Moon

Only in Ultra Sun & Ultra Moon
Static Encounter: Ultra Space Wilds

Swellow also appears in

How to get Swellow in Sun, Moon, Ultra Sun & Ultra Moon

Its base catch rate is 45 out of 255 (higher is easier); the catch rate calculator works out your odds with each ball. For the look, the best colour match is Great Ball or Lure Ball.

Swellow in every game · Pokémon Sun, Moon, Ultra Sun & Ultra Moon interactive map (Alola)